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  3. Mineral Resource Data System (MRDS)

Gill Ranch Chromite Deposits

Past Producer in Tulare county in California, United States with commodities Chromium, Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10117509
MAS/MILS ID 0061070009
Record type Site
Current site name Gill Ranch Chromite Deposits
Alternate or previous names Gill Ranch Mine, Gill Mine

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -119.05624, 36.27746 (WGS84)
Elevation 213
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Tulare(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rocky Hill(quadrangle 1:24,000 scale)

Visalia(quadrangle 1:100,000 scale)

Fresno(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Tulare Lake Bed(hydrologic unit)

Tulare-Buena Vista Lakes(hydrologic accounting unit)

Tulare-Buena Vista Lakes(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tulare

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 019 S 027 E 16 NWSWNE California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

Materials Type of material
Chlorite Unknown
Chromite Unknown
Magnesite Unknown
Serpentine Unknown
Talc Unknown

Nearby scientific data

Main Entrance (1) -119.05624, 36.27746
ListMap

Economic information

Ore body information

  • Strike N43W
    Dip 90S
    Thickness 5M
    Length 70M
    Width 5M
    Area 1HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Shape of Orebody #2 IRREGULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Strike And Dip N43W:90S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 1
    Date of Last Modification 820825

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1917
Year of first production 1917

Mining district

District name Rocky Hill

Mineral rights holdings

Type of mineral rights Fee Ownership
Type of mineral rights Other

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Boston Ranch Co.
    Interest 100
    Home office California
    Year 1976
  • Type Operator
    Owner Sweet, A. D., Carson, F. Et Al.(Last Operators)
    Home office California
    Year 1976
    First year 1918

Comments on the production information

  • TOTAL PRODUCTION (ALL WW1)WAS 400 TONS OF ORE AVERAGING 40% NO ORE SEEN IN PLACE,NO RESERVE ESTIMATES IN THE LITERATURE INSUFFICIENT DATA FOR MATRIX CALCULATION. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 04.19,CR2O3 45.31, FEO 13.82, TOTAL FE 15.44, AL203 14.17, MGO CR/FE 2.58.

Workings at the site

  • Type of workings Surface
    Area 1HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .6
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1976
  • Type of workings Underground
    Length 28M
    Overall depth 10M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN STOPE
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Number of Shafts 1
    Length of Inclines (m) 0
    Slope of Inclines 0
    Avg. Length of Adits (m) 6
    Number of Adits 3
    1st Condition of Workings CAVED AT PORTAL
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Year of Information 1960

Reference information

Bibliographic references

  • Deposit

    CALIF. DIV. MINES BULLETIN 134, 1948, PART III, CHAPT. 3,

  • Deposit

    P. 96.

  • Deposit

    CALIF. JOUR. MINES AND GEOL., V. 54, 1958, P. 336.

Reporter information

Type Date Name Affiliation Comment
Reporter 02-SEP-1992 Stinson U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.